【作者】 孙启兵； 刘红军； 黄楠； 阮驰； 朱少岚； 赵卫；

【Author】 SUN Qi-bing1,2,LIU Hong-jun1,HUANG Nan1,RUAN Chi1,ZHU Shao-lan1,ZHAO Wei1(1.State Key Laboratory of Transient Optics and Photonics,Xi’an Institute of Optics and Precision Mechanics,CAS,Xi’an 710119;China 2.Graduate University of CAS,Beijing 100049;China)

【机构】 中国科学院西安光学精密机械研究所瞬态光学与光子技术国家重点实验室； 中国科学院研究生院；

【摘要】 利用二极管泵浦的电光调Q Nd:YAG激光器输出的1064 nm激光抽运非临界相位匹配(NCPM)的KTA晶体(5 mm×5 mm×25 mm,θ=90°,Φ=0°),采用单谐振外部谐振腔,同时获得了3.467μm和1.535μm的参量光输出。当泵浦激光的脉宽为13ns、重复频率为100 Hz、平均功率为0.6 W时,获得了脉宽6 ns、平均功率84 mW的3.467μm输出和平均功率98 mW的1.535μm输出,1,064 nm泵浦激光到中红外激光的转换效率高达14%,输出光斑近TEM00模分布。同时对实验过程中观察到的红光和绿光进行了理论分析,给出了其相位匹配曲线。更多还原

【Abstract】 The 3.467 μm and 1.535 μm parametric output light are obtained simultaneously based on a type II noncritical phase matching KTA crystal(5 mm×5 mm×25 mm,θ=90°,Φ=0°) and a single resonant extracavity,which is pumped by a diode pumped Q-switched Nd:YAG laser.The average power of 84 mW at 3.467 μm is obtained with the pulse width of 6 ns and repetition rate of 100 Hz,corresponding to a conversion efficiency as high as 14% from 1.064 μm to 3.467 μm.Besides the mid-infrared output,the average power of 98 mW at 1.535 μm is obtained simultaneously.The beam spatial profile for 3.467 μm is near TEM00 mode.The phase matching curves for the red and green light,which are observed in the experiment,are demonstrated.更多还原